Four-eyed fish

Genus of fishes

The four-eyed fishes are a genus, Anableps, of fishes in the family Anablepidae. Like other fishes, they have just two eyes, unusually raised above the top of the head. Each eye is divided into two different parts, so that they can see below and above the water surface at the same time.

From Wikipedia, under CC BY-SA. More on occurri.